<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>确定对话框</title>
</head>
<body>
    <input type="button" value="删除" onclick="del()">
    <script>
        function del(){
            confirm('确定要删除吗？');
        }
    </script>
</body>
</html>